Question

Tetraedru regulat ABCD
Muchia=8 cm
Calculati Aria totala

Answer 1

Fiind regulat, aria totala este aria unei fete inmultita cu 4.

$4* A_{fata}= 4* \frac{ l^{2} \sqrt{3} }{4}= l^{2} \sqrt{3}=64 \sqrt{3}(cm^{2}).$